// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_RENDERER_MOJO_BINDINGS_CONTROLLER_H_
#define CONTENT_RENDERER_MOJO_BINDINGS_CONTROLLER_H_

#include <string>

#include "base/macros.h"
#include "content/public/renderer/render_frame_observer.h"
#include "content/public/renderer/render_frame_observer_tracker.h"
#include "mojo/public/cpp/system/core.h"

namespace content {

class MojoContextState;

enum class MojoBindingsType { FOR_WEB_UI,
    FOR_LAYOUT_TESTS,
    FOR_HEADLESS };

// MojoBindingsController is responsible for enabling the renderer side of mojo
// bindings. It creates (and destroys) a MojoContextState at the appropriate
// times and handles the necessary browser messages. MojoBindingsController
// destroys itself when the RendererFrame it is created with is destroyed.
class MojoBindingsController
    : public RenderFrameObserver,
      public RenderFrameObserverTracker<MojoBindingsController> {
public:
    MojoBindingsController(RenderFrame* render_frame,
        MojoBindingsType bindings_type);
    void RunScriptsAtDocumentStart();
    void RunScriptsAtDocumentReady();

private:
    ~MojoBindingsController() override;

    void CreateContextState();
    void DestroyContextState(v8::Local<v8::Context> context);
    MojoContextState* GetContextState();

    // RenderFrameObserver overrides:
    void WillReleaseScriptContext(v8::Local<v8::Context> context,
        int world_id) override;
    void DidClearWindowObject() override;
    void OnDestruct() override;

    const MojoBindingsType bindings_type_;

    DISALLOW_COPY_AND_ASSIGN(MojoBindingsController);
};

} // namespace content

#endif // CONTENT_RENDERER_MOJO_BINDINGS_CONTROLLER_H_
